合肥市夏季热岛特征研究

根据2002牟夏季高温期间合肥市城市小气候考察的资料，分析了合肥市夏季城市热岛特征以及热岛强度的历史变化。结果表明：1）合肥市夏季热岛强度的日变化与冬季明显不同，夏季晴天一天中热岛强度只出现一个峰值，其基本特征与Oke提出的理想状态下的城市热岛强度日变化的模式曲线非常相似，而冬季与高纬地区的加拿大卡尔加里城市的热岛强度日变化特征接近。这反映了冬、夏两季人类活动、能源消耗量的不同；2）随着城市范围的扩大和城市绿化工程的实施，合肥市热岛面积、分布形状有了一定的改变，但主要分布特征和强度基本没有变化。

A Study on the Summer Characteristics of Urban Heat Island in Hefei

The characteristic of the summer heat island of urban Hefei is analyzed based on the microclimate data observed in urban Hefei during the period of high temperature in the summer of 2002. The development of the urban heat island intensity is analyzed in the light of relevant papers. The results of the present study indicate that the diurnal variation of the heat island intensity in summer is obviously different from one in winter, and there is only one peak in the curve of the diurnal variation of heat island intensity. The basic character of diurnal variation in summer is very similar to that of the urban heat island under the ideal conditions put forth by Oke, while the basic character of diurnal variation in winter is similar to that of the Calgary in Canada of the high latitude area, which reveals that the human activity and energy consumption are different in summer and winter. With the enlargement of urban area and the carrying out of urban afforestation, both the area and distribution of the urban heat island have to some extent changed, but its main distribute character and intensity have no obvious change.